# TACHS Math : Decimals

## Example Questions

### Example Question #1 : Math

Square 0.44.

Explanation:

To square a number means to multiply it by itself, so we seek to compute

To multiply two decimal fractions, first multiply, ignoring the decimal points:

Move the (implied) decimal point the number of spaces right equal to the total number of digits right of the decimal points in the factors; this can be seen to be four:

The square of 0.44 is 0.1936.

### Example Question #11 : Tachs: Math And Ability

Tiffany earns  each week. If Mark earns  less than Tiffany, what is the sum of their salaries each week?

Explanation:

Start by finding out how much Mark makes. Since he makes  less than Tiffany, we can write the following to find Mark's weekly salary:

Mark must make  each week. Now, add together their salaries to find the sum.

### Example Question #1 : Decimals

Rachel earns  an hour as an assistant in a science lab. How many  hour work weeks will she need to work in order to pay for a car that costs ?

Cannot be determined

Explanation:

Start by figuring out how much Rachel can earn in each week by multiplying her hourly rate by the number of hours worked each week.

Now, divide the amount she needs to earn by the amount earned each week to find how many weeks she will need to work to earn that amount.

Rachel must work for  weeks in order to earn enough for the car.